Transient simulation of magnetic circuits using the permeance-capacitance analogy

When modeling magnetic components, the permeance-capacitance analogy avoids the drawbacks of traditional equivalent circuits models. The magnetic circuit structure is easily derived from the core geometry, and the energy relationship between electrical and magnetic domain is preserved. Non-linear core materials can be modeled with variable permeances, enabling the implementation of arbitrary saturation and hysteresis functions. Frequency-dependent losses can be realized with resistors in the magnetic circuit. The magnetic domain has been implemented in the simulation software PLECS. To avoid numerical integration errors, Kirchhoff´s current law must be applied to both the magnetic flux and the flux-rate when solving the circuit equations.